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How to fix dead atmega and attiny avr chips

Atmega fusebit doctor, as name says it, device for repairing dead Atmega and Attiny family AVRs by writing fabric fusebits. Most common mistakes or problems are a wrong clock source (CKSEL fusebits), disabled SPI programming (SPIEN fuse) or disabled reset pin (RSTDISBL fuse). This simple and cheap circuit will fix you uC in a fraction of a second. If in first case we can help ourself with clock generator, t ...

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I2C Bus for ATtiny and ATmega

I love the Atmel AVR microcontrollers! Since building the Ghetto Development System described in this Instructable, I've had no end of fun experimenting with the AVR ATtiny2313 and the ATmega168 in particular. I even went so far as to write an Instructable on using switches as inputs, and extended the Ghetto Development System concept to CPLDs. During a recent project, I needed several switches for setting ...

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DIY USB password generator using ATtiny Microcontroller

Having done half a dozen V-USB tutorials I decided it’s time to whip up something cool. As USB keyboards were an area untouched, I decided to make a small USB HID keyboard device that types a password stored in EEPROM every time it’s attached. A new password can be generated just by tabbing CAPS LOCK a few times (4 times to start password regeneration and one tab for each password character generated, 10 is ...

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Easy Data Logger with Virtual USB using ATtiny45 microcontroller

“V-USB is a software-only implementation of a low-speed USB device for Atmel’s AVR® microcontrollers, making it possible to build USB hardware with almost any AVR® microcontroller, not requiring any additional chip.” For further details on V-USB and licensing, visit http://www.obdev.at/products/vusb/index.html This is a data logger project that reads an analog signal, converts into digital number, and sends ...

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Blinking, Singing, Marioman using Attiny microcontrollers

Use an attiny13a, two LEDs and a greeting card speaker to create a blinking Marioman that plays the Super Mario Brothers theme song. This can be an easy low-cost project for anyone who is looking for a fun way to break into AVR programming! The notes of the songs are generated by a square wave outputted on a single pin of the AVR microcontroller. The LEDs that alternate on each note are connected to 2 pins ...

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Halloween Robot using Attiny microcontrollers

Halloween Robot controlled by an old wingman joystick. I don't reccommend this for beginners with electronics only because some things like joysticks and power adapters are not all the same and must be modified. Additionally I provide programming code which will only be useful for particular stepper motors without modification. **This is still unfinished, but Halloween is coming up so I'm going to publish i ...

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3 Easy Holiday Gifts using ATTiny microcontroller

Every year the holiday season rolls around and I get stuck on what to give for my friends and family.  People always say that it's better to make the gift yourself than buy it at a store so this year I did just that.  The first displays a name or basic image when waved through the air, the second fades smoothly between two white led's (It also has a safety pin to attach it to clothes or a purse), and the th ...

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